Biogas cogeneration

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Renewable electrical and thermal energy from organic residues.

Biogas is a natural fuel that is obtained through anaerobic digestion, i.e. bacterial fermentation that takes place in the absence of oxygen of organic residues from plant or animal residues.

About 50-70% of the biogas produced is made up of methane and the remainder of carbon dioxide and other minor components. If adequately processed, it is able to power the internal combustion engine of a cogeneration plant and to produce totally renewable electricity and thermal energy.


ECOMAX® Biogas

How a biogas plant works

A biogas plant consists mainly of two parts: the anaerobic digestion part, where the actual production of biogas takes place (consisting of one or more digestors) and the transformation of biogas into energy part, i.e. the cogeneration plant.

Biogas can be produced starting from different raw materials, such as livestock effluents, sludge from wastewater treatment plants (OFMSW), agro-industrial waste and crop residues. The energy yield, in terms of biogas produced and therefore of electrical and thermal energy generated, varies according to the characteristics of the raw material chosen.

Digestors play a key role in the initial phase of the biogas production process, but the energy efficiency and overall economic performance of the plant depend on the quality and reliability of the technological solutions that make up the cogeneration group.

Energy produced

Electric power

to be sold to the network

Thermal energy

for production of:
• hot water
• steam
• cold water

Technologies and operating process of a biogas CHP plant



Waste materials become a resource, allowing the production of electricity and renewable heat, as well as of digestate, an excellent fertilizer that can be re-used in the agricultural process.



With a biogas cogeneration plant, respect for the environment is guaranteed thanks to the lack of use of fossil fuels to power the cogeneration plant.


Efficiency measures

Cogeneration from biogas allows producing programmable energy, which can balance the input of non-programmable renewable sources such as photovoltaic or wind energy.



The economic advantage guaranteed by biogas cogeneration translates into a substantial saving and into an integration of agricultural income.

Sectors of applications

Biogas cogeneration plants can be powered by different types of matrices and, consequently, are a strategic choice for various production sectors.
  • Agriculture

  • Landfills/OFMSW

  • Agro-industrial waste

  • Wastewater treatment

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